1. Error appears in Browser Tools > Network tab when I navigate to /wp-admin/admin.php?page=googlesitekit-dashboard
2. Linux do 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5+deb10u2 (2019-08-08) x86_64. This is a Digital Ocean droplet, PHP-FPM 7.3.4-2, Apache Server version: Apache/2.4.38 (Debian).
2a. REST API is working fine.
3. Disabled WP Super Cache, Monster Insights and ModSecurity. Now it doesn’t show the loading gray boxes but says “…data is not yet available, please check back later.” (which I suppose it shows in case it’s not able to fetch the data). But the ?request query var did get a 200 response with the data like (trimmed):
pagespeed-insights::pagespeed::[uuid]: {errors: {500: [,…]}, error_data: {500: {status: 500, reason: “lighthouseError”}}}
I’m going to watch this for another 24-48 hours and report back. Thanks for attending to this.